Something is not right...

Here is a drawing I did in 2007.
If you were to choose one thing that struck you as out of place, or not so realistic, what would it be?

It seems quite funny now, picturing me holding a fork with my left hand - keeping as still as I could - all the while trying to outline and shade the picture with my right hand! Not an easy task.

Once again, this method is where I covered the whole page with graphite and erased to achieve the lighter shades and white.

Now back to my initial question: what is out of place? What makes this picture defy realism?
By this stage I had learnt a lot about drawing what I see, but I hadn't yet caught on to the fact that solid lines are few and far between on basically anything you look at.

Look at the outlines of the fingers and finger nails. The dark lines define the shape of the hand well enough, but in real life - they're just not there!

The trick is to either get rid of the line all together, and have two different shades meet, or shade up to the line, thus eradicating it.